Intercom system



FIG. 1 is a right side elevational view of an intercom system according to an embodiment of the invention;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof,

FIG. 4 is a front elevational view thereof;

FIG. 5 is a front, top, right side perspective view thereof, and

FIG. 6 is a rear, top, right side perspective view thereof.

Any dashed lines in the drawings depict environment and/or disclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an intercom system, as shown and described. 